苏州城市气溶胶和臭氧相互作用的观测分析
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摘要
利用2014年苏州地区观测资料对城市气溶胶与O_3之间的相互作用进行研究,结果表明:苏州市晴空指数(CI)与PM_(10)、PM_(2.5)呈显著负相关; PM_(10)、PM_(2.5)质量浓度每增加1μg/m3,晴天条件下白天向下短波辐射(DSR)分别下降1. 48 W/m2和1. 52 W/m2; DSR与O_3呈显著正相关; O_3与PM_(10)、PM_(2.5)呈负相关,表明气溶胶对O_3浓度存在衰减作用。2014年11月10日—12日个例研究表明,在到达地面的DSR几乎不变的情况下,气溶胶与O_3之间发生非均相化学反应,造成O_3浓度降低。2014年12月13日—14日个例研究表明,气溶胶通过对太阳辐射的消光作用,造成到达地面的DSR减弱,O_3浓度降低。
The observation data from Suzhou were studied on the interaction between aerosol and ozone. The results showed that PM_(10) and PM_(2.5) were negatively correlated with clearness index. On average,in the daytime of fine weather,a 1 μg/m3 increase in PM_(10) or PM_(2.5) concentration was associated with 1. 48 W/m2 or 1. 52 W/m2 decrease in downward shortwave radiation( DSR),respectively. Ozone was significantly positive correlated with DSR,and negative correlated with PM_(10) or PM_(2.5). Aerosol had the effect on O_3 reduction. Case study showed that during the research period of November 10 th to 12 th,2014,when the DSR reaching to the ground was almost unchanged,heterogeneous chemical reaction happened between aerosol and O_3,resulting in decreasing of O_3 concentration. According to case study through December 13 th to 14 th,2014,the DSR on the ground and ozone decreased by aerosol's extinction for solar radiation.
The observation data from Suzhou were studied on the interaction between aerosol and ozone. The results showed that PM_(10) and PM_(2.5) were negatively correlated with clearness index. On average,in the daytime of fine weather,a 1 μg/m3 increase in PM_(10) or PM_(2.5) concentration was associated with 1. 48 W/m2 or 1. 52 W/m2 decrease in downward shortwave radiation( DSR),respectively. Ozone was significantly positive correlated with DSR,and negative correlated with PM_(10) or PM_(2.5). Aerosol had the effect on O_3 reduction. Case study showed that during the research period of November 10 th to 12 th,2014,when the DSR reaching to the ground was almost unchanged,heterogeneous chemical reaction happened between aerosol and O_3,resulting in decreasing of O_3 concentration. According to case study through December 13 th to 14 th,2014,the DSR on the ground and ozone decreased by aerosol's extinction for solar radiation.
引文
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[3]徐少才,薛莲,薛传文,等.青岛市大气臭氧的生成敏感性及影响因素分析[J].环境监测管理与技术,2016,28(2):19-22.
[4]陈九龄,仇欣,潘骏,等.上海虹桥机场大气污染特征分析[J].环境监测管理与技术,2018,30(6):39-43.
[5] KYLLING A,BAIS A F,BLUMTHALER M,et al. Effect of aerosols on solar UV irradiances during the photochemical activity and solar ultraviolet radiation campaign[J]. Journal of Geophysical Research:Atmospheres,1998,103(D20):26051-26060.
[6] HE S,CARMICHAEL G R. Sensitivity of photolysis rates and ozone production in the troposphere to aerosol properties[J].Journal of Geophysical Research:Atmospheres,1999,104(D21):26307-26324.
[7]邓雪娇,吴兑,铁学熙,等.大城市气溶胶对光化辐射通量及臭氧的影响研究(Ⅰ)——国内外研究现状与观测事实述评[J].广东气象,2006(3):10-17.
[8]邓雪娇,周秀骥,吴兑,等.珠江三角洲大气气溶胶对地面臭氧变化的影响[J].中国科学:地球科学,2011,41(1):93-102.
[9] WANG H,XUE M,ZHANG X Y,et al. Mesoscale modeling study of the interactions between aerosols and PBL meteorology during a haze episode in Jing-Jin-Ji(China)and its nearby surrounding region——Part 1:aerosol distributions and meteorological features[J]. Atmospheric Chemistry and Physics,2015,15(6):3257-3275.
[10] SUN K,LIU H N,WANG X Y,et al. The aerosol radiative effect on a severe haze episode in the Yangtze River Delta[J]. Journal of Meteorological Research,2017,31(5):865-873.
[11]李佳慧,刘红年,王学远.苏州城市颗粒物与臭氧相互作用的数值模拟研究[J].南京大学学报(自然科学),2016,52(6):989-1000.
[12]温康民,史军,虞琴. 1961—2012年长江三角洲地区霾日气候特征及变化分析[J].环境监测管理与技术,2016,28(6):28-32.
[13]钱俊龙,刘红年,唐丽娟,等.苏州城市灰霾及气溶胶对大气消光贡献的模拟研究[J].南京大学学报(自然科学),2013,49(3):311-319.
[14] GU L H,BALDOCCHI D,VERMA S B,et al. Advantages of diffuse radiation for terrestrial ecosystem productivity[J]. Journal of Geophysical Research:Atmospheres,2002,107(D6):1-23.